Abstract
Reducible supports can affect the performance of metal catalysts by the formation of suboxide overlayers upon reduction, a process referred to as the strong metal-support interaction (SMSI). A combination of operando electron microscopy and vibrational spectroscopy revealed that thin TiO x overlayers formed on nickel/titanium dioxide catalysts during 400°C reduction were completely removed under carbon dioxide hydrogenation conditions. Conversely, after 600°C reduction, exposure to carbon dioxide hydrogenation reaction conditions led to only partial reexposure of nickel, forming interfacial sites in contact with TiO x and favoring carbon-carbon coupling by providing a carbon species reservoir. Our findings challenge the conventional understanding of SMSIs and call for more-detailed operando investigations of nanocatalysts at the single-particle level to revisit static models of structure-activity relationships.
Original language | English |
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Pages (from-to) | 644-651 |
Number of pages | 8 |
Journal | Science (New York, N.Y.) |
Volume | 380 |
Issue number | 6645 |
DOIs | |
Publication status | Published - 12 May 2023 |
Bibliographical note
Publisher Copyright:Copyright © 2023 the authors, some rights reserved.
Funding
This work was supported by BASF and NWO CHIPP (research grant to B.M.W.); the MCEC NWO Gravitation Program (B.M.W.); the ARC-CBBC NWO Program (B.M.W.); the European Research Council (grant 770887 PICOMETRICS to S.V.A.); and the European Research Council (grant 815128 REALNANO to S.B.).
Funders | Funder number |
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ARC-CBBC NWO | |
MCEC NWO | |
BASF | |
European Research Council | 815128, 770887 PICOMETRICS |
Nederlandse Organisatie voor Wetenschappelijk Onderzoek |